But if the registration process get difficult, I think we would loss potential user too.
If performing the simple task of verifying your registration email is to difficult for someone they are going to have a real hard time getting involved in crypto or anything in life for that matter. Sandy's point is valid, considering the only people this would really affect are people creating multiple low level accounts for spamming, or posting malware links. You can see it from time to time when a massive number of old threads you've commented in get bumped by some random post with a business link is spouting the same garbage, or multiple accounts at the same time.
